80 
% 
MISCELLANY. 
to be of considerable importance in the industrial arts. Sulphur does 
not occur in France, but considerable quantities of sulphate of lime ; 
this decomposed with coal, and the moist sulphuret obtained decom- 
posed in its turn by the carbonic acid derived from any furnace, would 
yield sulphuretted hydrogen. This gas, conveyed into a chamber 
containing air anddeutoxide of nitrogen, would furnish water and sul- 
phur; so that a small quantity of deutoxide of nitrogen would suffice 
in this case, as in the preparation of sulphuric acid^ for the transforma- 
tion of a large quantity of the reacting bodies. 
In Berzelius's "Manual of Chemistry," it is stated that the deut- 
oxide of nitrogen and sulphuretted hydrogen are mutually decom- 
posed ; that sulphuret of ammonium or the hydrosulphate of ammonia 
and the protoxide of nitrogen are formed. This reaction is true w^hen 
the gases are moist, but when dry they do not react upon each other. 
The liquid derived from the action of the sulphuretted hydrogen 
upon the nitric acid was separated from sulphur and again mixed with 
the wash-waters of this latter body ; the whole was saturated hot with 
carbonate of baryta until the appearance of a slight ammoniacal odourj 
a few drops of sulphuric acid were added to neutralize the liquid; it 
was then thrown upon a fiher, the precipitate of sulphate of baryta 
well washed, and all the liquids united and evaporated until there re- 
mained but 100 grms.; the crystalline residue kept for several hours at 
a temperature of 113°, weighed 3.80 grms. Analysis has proved that 
this salt is formed almost entirely of sulphate of ammonia, containing 
so minute a quantity of the nitrate that the protosulphate of iron is 
scarcely coloured by it in the presence of sulphuric acid. 
Chem. Gaz. from Ann. de Chim. 
